package com.holystone.orca.common;

import com.holystone.orca.sys.common.SystemConstant;
import com.holystone.orca.sys.model.StaffVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.PrintWriter;

/**
 * Copyright (c) 2015, HOLYSTONE Technologies, Inc.
 * All right reserved.
 * @desc:拦截器
 * @author:王凯征
 * @date:2015年11月23日 下午3:52:39
 */
public class CommonInterceptor implements HandlerInterceptor{

	//private static Logger log = Logger.getLogger(CommonInterceptor.class);
    /**  
     * 在业务处理器处理请求之前被调用  
     * 如果返回false  
     *     从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链 
     * 如果返回true  
     *    执行下一个拦截器,直到所有的拦截器都执行完毕  
     *    再执行被拦截的Controller  
     *    然后进入拦截器链,  
     *    从最后一个拦截器往回执行所有的postHandle()  
     *    接着再从最后一个拦截器往回执行所有的afterCompletion()  
     */    
	@Override
    public boolean preHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler) throws Exception {
		String requestUri = request.getRequestURI();  
        String contextPath = request.getContextPath();
        String url = requestUri.substring(contextPath.length());  
        
        ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
        HttpSession session = attr.getRequest().getSession(true);
		//测试url参数  可以跳过权限请求
        String tparam=request.getParameter("t");
        boolean flag = false;
        
        if("/".equals(url) || "/framework/ajaxLoginKey.do".equals(url) || "/framework/login.do".equals(url) 
        		|| "/framework/loginSuccess.do".equals(url) || "/framework/checkLoginInfo.do".equals(url)
        		||"/cmdb/licence/checkLicence.do".equals(url)||"/framework/connectUs.do".equals(url)
        		||"/framework/licenceManager.do".equals(url)||"/cmdb/licence/upLoadLicence.do".equals(url)
        		){
        	flag = true;
        }else if(tparam!=null){
			flag = true;
		}else{
        	StaffVO staffVO=(StaffVO) session.getAttribute(SystemConstant.SESSION_STAFF_KEY);
        	if(staffVO == null){  
                flag = false;  
            }else{
        		flag = true;
            }
        }
        if(!flag){
			if(url.contains("/ipDispatch/agentTask/")){
				PrintWriter printWriter = response.getWriter();
				printWriter.print("{\"code\":"+SystemConstant.RESPONSE_CODE_RESOURCE_NOT_EXISTS+"}");
				printWriter.flush();
				printWriter.close();
			}else if(request.getHeader("x-requested-with")!=null
				&& request.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")){ 
				PrintWriter printWriter = response.getWriter(); 
				printWriter.print("{sessionState:0,contextPath:'"+contextPath+"'}"); 
				printWriter.flush(); 
				printWriter.close(); 
			}else{
				//request.getRequestDispatcher("/framework/login.do").forward(request, response);
	        	response.setCharacterEncoding("utf-8");
				request.setCharacterEncoding("utf-8");
				response.setContentType("text/html");
				PrintWriter pw=response.getWriter();
				pw.print("<script>if (window != top)"
						+ "top.location.href = location.href;"
						+ "window.parent.location.href='"+contextPath + "/framework/login.do'"+";"
								+ "</script>");
				if(null != pw){
					pw.close();
				}
			}
        }
		return flag;
    }
	
    /** 
     * 在业务处理器处理请求执行完成后,生成视图之前执行的动作    
     * 可在modelAndView中加入数据，比如当前时间 
     */  
	@Override
    public void postHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler,    
            ModelAndView modelAndView) throws Exception {     
        if(modelAndView != null){
            modelAndView.addObject("var", "测试postHandle");    
        }    
    }    
    
    /**  
     * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等   
     *   
     * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()  
     */    
	@Override
    public void afterCompletion(HttpServletRequest request,    
            HttpServletResponse response, Object handler, Exception ex)    
            throws Exception { 
    }
}
